oak-editor/app/widget/slider/rationalslider.cpp

/***

  Olive - Non-Linear Video Editor
  Copyright (C) 2022 Olive Team

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program.  If not, see <http://www.gnu.org/licenses/>.

***/

#include "rationalslider.h"

#include "core.h"
#include "widget/menu/menu.h"
#include "widget/menu/menushared.h"

namespace olive
{

#define super DecimalSliderBase

RationalSlider::RationalSlider(QWidget *parent)
	: super(parent)
	, lock_display_type_(false)
{
	connect(Core::instance(), &Core::TimecodeDisplayChanged, this,
			&RationalSlider::UpdateLabel);
	connect(SliderBase::label(), &SliderLabel::customContextMenuRequested, this,
			&RationalSlider::ShowDisplayTypeMenu);

	SetDisplayType(kFloat);

	SetValue(rational(0, 0));
}

rational RationalSlider::GetValue()
{
	return GetValueInternal().value<rational>();
}

void RationalSlider::SetValue(const rational &d)
{
	SetValueInternal(QVariant::fromValue(d));
}

void RationalSlider::SetDefaultValue(const rational &r)
{
	super::SetDefaultValue(QVariant::fromValue(r));
}

void RationalSlider::SetMinimum(const rational &d)
{
	SetMinimumInternal(QVariant::fromValue(d));
}

void RationalSlider::SetMaximum(const rational &d)
{
	SetMaximumInternal(QVariant::fromValue(d));
}

void RationalSlider::SetTimebase(const rational &timebase)
{
	timebase_ = timebase;

	// Refresh label since we have a new timebase to generate a timecode with
	UpdateLabel();
}

void RationalSlider::SetDisplayType(const RationalSlider::DisplayType &type)
{
	display_type_ = type;

	UpdateLabel();
}

void RationalSlider::SetLockDisplayType(bool e)
{
	lock_display_type_ = e;
}

bool RationalSlider::GetLockDisplayType()
{
	return lock_display_type_;
}

void RationalSlider::DisableDisplayType(RationalSlider::DisplayType type)
{
	disabled_.append(type);
}

QString RationalSlider::ValueToString(const QVariant &v) const
{
	rational r = v.value<rational>();

	if (r.isNaN()) {
		return tr("NaN");
	} else {
		double val = r.toDouble() + GetOffset().value<rational>().toDouble();

		switch (display_type_) {
		case kTime:
			return QString::fromStdString(Timecode::time_to_timecode(
				r, timebase_, Core::instance()->GetTimecodeDisplay()));
		case kFloat:
			return FloatToString(val, GetDecimalPlaces(),
								 GetAutoTrimDecimalPlaces());
		case kRational:
			return QString::fromStdString(v.value<rational>().toString());
		}

		return v.toString();
	}
}

QVariant RationalSlider::StringToValue(const QString &s, bool *ok) const
{
	rational r;
	*ok = false;

	switch (display_type_) {
	case kTime: {
		r = Timecode::timecode_to_time(s.toStdString(), timebase_,
									   Core::instance()->GetTimecodeDisplay(),
									   ok);
		break;
	}
	case kFloat: {
		// First, convert to a double
		double d = s.toDouble(ok);
		if (!(*ok)) {
			break;
		}

		// If double conversion succeeded, convert to a rational
		r = rational::fromDouble(d, ok);
		break;
	}
	case kRational:
		r = rational::fromString(s.toStdString(), ok);
		break;
	}

	//return QVariant::fromValue(r - GetOffset().value<rational>());
	return QVariant::fromValue(r);
}

QVariant RationalSlider::AdjustDragDistanceInternal(const QVariant &start,
													const double &drag) const
{
	// Assume we want smallest increment to be timebase or 1 frame
	return QVariant::fromValue(start.value<rational>() +
							   rational::fromDouble(drag) * timebase_);
}

void RationalSlider::ValueSignalEvent(const QVariant &v)
{
	emit ValueChanged(v.value<rational>());
}

bool RationalSlider::ValueGreaterThan(const QVariant &lhs,
									  const QVariant &rhs) const
{
	return lhs.value<rational>() > rhs.value<rational>();
}

bool RationalSlider::ValueLessThan(const QVariant &lhs,
								   const QVariant &rhs) const
{
	return lhs.value<rational>() < rhs.value<rational>();
}

void RationalSlider::ShowDisplayTypeMenu()
{
	Menu m(this);

	if (!GetLockDisplayType()) {
		if (!disabled_.contains(kFloat)) {
			QAction *float_action = m.addAction(tr("Float"));
			float_action->setData(kFloat);
			connect(float_action, &QAction::triggered, this,
					&RationalSlider::SetDisplayTypeFromMenu);
		}

		if (!disabled_.contains(kRational)) {
			QAction *rational_action = m.addAction(tr("Rational"));
			rational_action->setData(kRational);
			connect(rational_action, &QAction::triggered, this,
					&RationalSlider::SetDisplayTypeFromMenu);
		}

		if (!disabled_.contains(kTime)) {
			QAction *time_action = m.addAction(tr("Time"));
			time_action->setData(kTime);
			connect(time_action, &QAction::triggered, this,
					&RationalSlider::SetDisplayTypeFromMenu);
		}
	}

	if (display_type_ == kTime) {
		if (!m.actions().isEmpty()) {
			m.addSeparator();
		}
		MenuShared::instance()->AddItemsForTimeRulerMenu(&m);
		MenuShared::instance()->AboutToShowTimeRulerActions(timebase_);
	}

	if (!m.actions().isEmpty()) {
		m.exec(QCursor::pos());
		UpdateLabel();
	}
}

void RationalSlider::SetDisplayTypeFromMenu()
{
	QAction *action = static_cast<QAction *>(sender());

	DisplayType type = static_cast<DisplayType>(action->data().toInt());

	SetDisplayType(type);
}

}